ccache: make src reproducible

    owner = "ccache";

    repo = "ccache";

    rev = "refs/tags/v${finalAttrs.version}";

    sha256 = "sha256-0T9iJXnDX8LffhB/5hsfBNyZQ211f0lL/7dvTrjmiE0=";

    # `git archive` replaces `$Format:%H %D$` in cmake/CcacheVersion.cmake

    # we need to replace it with something reproducible

    # see https://github.com/NixOS/nixpkgs/pull/316524

    postFetch = ''

      sed -i -E \

        's/version_info "([0-9a-f]{40}) .*(tag: v[^,]+).*"/version_info "\1 \2"/g w match' \

        $out/cmake/CcacheVersion.cmake

      if [ -s match ]; then

        rm match

      else # pattern didn't match

        exit 1

      fi

    '';

    hash = "sha256-YHSr2pnk17QEdrIHInXX2eBFN9OGjdleaB41VLaqlnA=";

  };

  outputs = [